Accelerator Complex U70 of IHEP: Status and Upgrades
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1 INSTITUTE FOR HIGH ENERGY PHYSICS () Protvino, Moscow Region, , Russia Accelerator Complex U70 of : Status and Upgrades (invited oral WEYCH01) Sergey Ivanov XXIII Russian Particle Accelerator Conference RuPAC-2012 September 24-28, 2012, St-Petersburg, Russia
2 Outlook Generalities Routine operation Machine development Light-ion program (+ elsewhere, oral rep. WECCH01) Conclusion Emphasis on a progress since RuPAC-2010 September 24-28, 2012 RuPAC-2012, St-Petersburg 2of 19
3 Layout 4 machines (since Oct 2007): 2 linacs 2 synchrotrons Modes: proton (default) URAL30-U1.5-U70 light-ion (d, C) I100(2 of 3)-U1.5-U70 to note: OKA (#21), FODS (#22), stretcher (#25) Light-ion: high energy intermediate energy GeV/u MeV/u In a SIS-18, SIS-100 name convention: LIS-233 [T m] LIS-6.9 [T m] September 24-28, 2012 RuPAC-2012, St-Petersburg 3of 19
4 Photo album of machines RFQ DTL URAL30 Alvarez DTL I100 RC PS U1.5 Main PS U70 September 24-28, 2012 RuPAC-2012, St-Petersburg 4of 19
5 Statistics 2 runs (7/24) per year: short (XPh 10 days ca) long (XPh 30 days ca) 2 MD(p) + ions 3 MD(p) + ions ppp 3 hr, 1000 cycles September 24-28, 2012 RuPAC-2012, St-Petersburg 5of 19
6 Extraction (fixed target) 2 nd ½ of flattop, IT & CD 1 st ½ of flattop, SSE Inventory: 1-turn FE SRE (Q38 & SSE) IT Si-CD SE flat-bottom (S)SE duty factor Ф 2 / Ф 2 = No lines of mains harmonics September 24-28, 2012 RuPAC-2012, St-Petersburg 6of 19
7 Machine development 4 machines: Planned maintenance Emergency maintenance Development (p- and i-modes) September 24-28, 2012 RuPAC-2012, St-Petersburg 7of 19
8 Machine development (1) new Local Control Center for U1.5 ring magnet PS 10 kv, 6 halls в 5 buildings, external 2 transformer stations, 3 switchovers 16 2/3 Hz September 24-28, 2012 RuPAC-2012, St-Petersburg 8of 19
9 40 ferrite loaded RF cavities: cavities , 30 of 40 in total Machine development (2) new Control (amplitude, phase) and Interlock System for the U70 RF accelerating system Катодные токи ВЧ сигналы ВЧ Сетка ВЧ ЛЗ Входные диф-ные усилители Амплитудные детекторы Входные аналоговые сигналы Фазовый дискриминатор Последовательный код от Шкафа Контроля Аналоговые коммутаторы 16х1 1 Аналог. сигнал Код адреса сигнала 2 Код адреса сигнала Схема блокировки ВЧ и формирования адреса сигнала (ПЛМ) Буфферные усилители АЦП Клавиатура Индикатор Индикация на блоке Блокир. АРА ПУ "НСВЧ" Аналоговый сигнал на шкаф контроля ПУ "Тракт закрыт" Процессор Мультиметр Фаза ЛЗ-С Фаза А-С Аналоговые компараторы Опорн АРА U резон. September 24-28, 2012 RuPAC-2012, St-Petersburg 9of 19
10 Machine development (3) Plan = 120 = No. of CF magnets test channels Beam Loss Monitoring System in the U operational channels Soft- and hard-ware complex (32-channel counters with control programs) SS# 22-34, 42-57, 106 September 24-28, 2012 RuPAC-2012, St-Petersburg 10 of 19
11 Machine development (4) Stand-alone runs of I m long 4 dipoles 8 quads 3 H/V-correctors Beam diagnostics InfraLight SP, PhIC GPhI RAS, Troitsk 2 modules, CO2, N2 и He, λ= μm 2 Hz, 4.5 J, almost, COTS ma 4000 cycles (former 800), i.e. >8 hr. September 24-28, 2012 RuPAC-2012, St-Petersburg 11 of 19
12 Machine development (5) Upgrade of RC PS U1.5 RF sustem V f RF df RF /dt T P RF P APhC kv and MHz 170 and 110 MHz/s 60 ms 60 kw 130 kv A AFC wide-band A Dynamic range 15 Transient time 1/5 Overshoot 1/10 September 24-28, 2012 RuPAC-2012, St-Petersburg 12 of 19
13 Machine development (6) New digital MO in RF of the U70 2 Phase-plane portrait of a bunch π π Momentum, normalized RF phase September 24-28, 2012 RuPAC-2012, St-Petersburg 13 of 19
14 DDS RF MO and Fbcks September 24-28, 2012 RuPAC-2012, St-Petersburg 14 of 19
15 Digital transverse Fbck z N z N z N FIR-3 & FIR-4 options September 24-28, 2012 RuPAC-2012, St-Petersburg 15 of 19
![[momentum spread] RF](/docs-images/82/85873088/images/16-6.jpg "noise September 24-28,")
16 Instabilities Back to factory default freq range of RF system, 2.6 (4.5)-6.1 MHz instead of о MHz Z ( kω ) k < 0 1 Λ β 2 ηe ej 0 Δ p p 2 Cures: momentum spread, RF gymnastics Distribution function [momentum spread] RF noise September 24-28, 2012 RuPAC-2012, St-Petersburg 16 of 19
17 Flat-bottom S(S)E 352 Gs, 1.32 GeV (p, test beam) 455 MeV/u (C) Graphite 30 mm (p 1.32 GeV) Be 4 mm (С 455 MeV/u) September 24-28, 2012 RuPAC-2012, St-Petersburg 17 of 19
18 Ion program d: q=1, A=2, q/a=1/2 C: q=6, A=12, q/a=1/2 Deuterons 2 H 1+ Carbon 12 C 6+ U MeV/u MeV/u March 30, 2008 December 08, 2010 U GeV/u 34.1 GeV/u April 27, 2010 April 24, MeV/u April 24, GeV/u in BTL#22 & FODS April 27, 2012 September 24-28, 2012 RuPAC-2012, St-Petersburg 18 of 19
19 Conclusion Accelerator Complex U70 of -Protvino: comprises 4 machines (URAL30, I100, U1.5, and U70 itself), readily ensures running the fixed-target physics program, is subject to ongoing upgrade program, has noticeably improved quality of proton beam, is on a way towards routine acceleration of light-ions to GeV per nucleon for high-energy nuclear physics now has slow extraction of 455 MeV per nucleon of 12 C 6+ beam U1.5 and U70 now belong to PS and (L)IS categories September 24-28, 2012 RuPAC-2012, St-Petersburg 19 of 19
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